# US 2019/0169388 A1 · Optical display device protecting film, optical member comprising same, and optical display device comprising same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0169388 A1
- Document ID: US20190169388A1
- Status: Published application
- Kind: A1
- Application number: 16/324,873
- Filed: 2017-08-02
- Published: 2019-06-06
- Earliest claimed: 2016-08-11
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Do Young KIM; Young Hoon KIM; Tae Ji KIM; Dong Myeong SHIN; Oh Hyun HWANG
- Web page: https://patentgrep.com/patent/US20190169388A1

## CPC

- G02B 1/14: Protective coatings, e.g. hard coatings
- C08J 7/0427: {with only one layer of a composition containing a polymer binder (with more layers C08J7/042)}
- C08J 7/043: Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50)
- C08J 7/046: Forming abrasion-resistant coatings; Forming surface-hardening coatings
- C08L 75/16: having terminal carbon-to-carbon unsaturated bonds
- C09D 133/10: Homopolymers or copolymers of methacrylic acid esters
- C09D 133/12: Homopolymers or copolymers of methyl methacrylate
- C09D 175/16: having terminal carbon-to-carbon unsaturated bonds
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- C08J 2375/04: Polyurethanes
- C08J 2475/16: having terminal carbon-to-carbon unsaturated bonds
- C08J 2483/12: containing polyether sequences
- C08K 2003/2244: {of zirconium}
- C08L 75/06: from polyesters
- G02B 6/26: Optical coupling means (G02B6/36, G02B6/42 take precedence)
- G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

Provided are an optical display device protecting film and an optical display device comprising the same, the optical display device protecting film comprising: a first substrate layer; and a hard coating layer formed on the first substrate layer, wherein the substrate layer is made of a thermoplastic polyurethane film, and the first substrate layer has a thickness of 100 μm to 200 μm and has a Shore hardness of 95 A to 98 A.

## Claims

### Claim 1

A protective film for optical displays, comprising: a first base layer; and a hard coating layer formed on the first base layer,
wherein the first base layer is formed of a thermoplastic polyurethane and the first base layer has a thickness of 100 μm or more to 200 μm or less and a Shore hardness of 95 A to 98 A.

### Claim 2

A protective film for optical displays, comprising: a first base layer; and a hard coating layer formed on the first base layer,
wherein the hard coating layer is formed of a hard coating composition comprising a first urethane (meth)acrylate oligomer, a second urethane (meth)acrylate oligomer, a (meth)acrylate monomer, zirconia particles, an initiator, a silicon-based additive, and a fluorine-based additive,
wherein the first urethane (meth)acrylate oligomer has different elongation from the second urethane (meth)acrylate oligomer,
wherein the first urethane (meth)acrylate oligomer is present in an amount of about 10 parts by weight to about 50 parts by weight and the second urethane (meth)acrylate oligomer is present in an amount of about 40 parts by weight to about 80 parts by weight, of the total amount of 100 parts by weights of the first urethane (meth)acrylate oligomer, the second urethane (meth)acrylate oligomer, the (meth)acrylate monomer, and the zirconia particles.

### Claim 3 (depends on 1)

The protective film for optical displays according to claim 1, wherein the thermoplastic polyurethane is an aliphatic or alicyclic thermoplastic polyurethane.

### Claim 4 (depends on 1)

The protective film for optical displays according to claim 1, wherein the first base layer has a ΔE value of about 3.0 or less, as calculated by Equation 1:
ΔE=[(ΔL*)2+(Δa*)2+(Δb*)2]1/2.
where in Equation 1, ΔL* is (L*)2−(L*)1; Δa* is (a*)2−(a*)1; Δb* is (b*)2−(b*)1; (L*)2 is L* (brightness value) of the first base layer after measurement of light resistance reliability; (L*)1 is L* of the first base layer before measurement of light resistance reliability; (a*)2 is a* of the first base layer after measurement of light resistance reliability; (a*)1 is a* of the first base layer before measurement of light resistance reliability; and (b*)2 is b* of the first base layer after measurement of light resistance reliability; and (b*)1 is b* of the first base layer before measurement of light resistance reliability, and measurement of light resistance reliability means treatment of the first base layer after the first base layer is left for 72 hours under a UV-B light source.

### Claim 5 (depends on 1)

The protective film for optical displays according to claim 1, wherein the hard coating layer is formed of a hard coating composition comprising a first urethane (meth)acrylate oligomer, a second urethane (meth)acrylate oligomer, a (meth)acrylate monomer, zirconia particles, an initiator, a silicon-based additive, and a fluorine-based additive,
wherein the first urethane (meth)acrylate oligomer has different elongation from the second urethane (meth)acrylate oligomer.

### Claim 6 (depends on 2)

The protective film for optical displays according to claim 2, wherein the first base layer is formed of a thermoplastic polyurethane and the first base layer has a thickness of about 100 μm to about 200 μm and a Shore hardness of about 95 A to about 98 A.

### Claim 7 (depends on 2)

The protective film for optical displays according to claim 2, wherein the first urethane (meth)acrylate oligomer has a weight average molecular weight of about 1,000 g/mol or more to less than about 4,000 g/mol and an elongation of about 1% or more to less than about 15%.

### Claim 8 (depends on 2)

The protective film for optical displays according to claim 2, wherein the second urethane (meth)acrylate oligomer has a weight average molecular weight of about 4,000 g/mol or more to about 8,000 g/mol or less and an elongation of about 15% or more to about 25% or less.

### Claim 9 (depends on 2)

The protective film for optical displays according to claim 2, wherein the zirconia particles have an average particle diameter (D50) of about 100 nm or less.

### Claim 10 (depends on 2)

The protective film for optical displays according to claim 2, wherein the (meth)acrylate monomer is present in an amount of about 1 part by weight to about 30 parts by weight and the zirconia particles are present in an amount of about 0.01 parts by weight to about 10 parts by weight, of the total amount of 100 parts by weight of the first urethane (meth)acrylate oligomer, the second urethane (meth)acrylate oligomer, the (meth)acrylate monomer, and the zirconia particles.

### Claim 11 (depends on 2)

The protective film for optical displays according to claim 2, wherein, the silicon-based additive is present in an amount of about 0.01 parts by weight to about 5 parts by weight and the fluorine-based additive is present in an amount of about 0.01 parts by weight to about 5 parts by weight, based on the total amount of 100 parts by weight of the first urethane (meth)acrylate oligomer, the second urethane (meth)acrylate oligomer, the (meth)acrylate monomer, and the zirconia particles.

### Claim 12 (depends on 1)

The protective film for optical displays according to claim 1, wherein the hard coating layer is directly formed on the first base layer and the hard coating layer has a thickness of about 3 μm or less to less than about 20 μm.

### Claim 13 (depends on 1)

The protective film for optical displays according to claim 1, wherein the protective film has an indentation modulus of about 0.3 GPa or more to less than about 1.5 GPa and an indentation hardness of about 0.1 GPa or more to less than about 0.3 GPa, as measured on the hard coating layer thereof using a nano-indenter.

### Claim 14 (depends on 13)

The protective film for optical displays according to claim 13, wherein the hard coating layer is formed of a hard coating composition comprising a first urethane (meth)acrylate oligomer, a second urethane (meth)acrylate oligomer, a (meth)acrylate monomer, zirconia particles, an initiator, a silicon-based additive, and a fluorine-based additive,
wherein the first urethane (meth)acrylate oligomer is present in an amount of about 25 wt % or more to about 45 wt % or less, of the total amount of the first urethane (meth)acrylate oligomer and the second urethane (meth)acrylate oligomer.

### Claim 15 (depends on 2)

The protective film for optical displays according to claim 2, wherein the protective film has an indentation modulus of about 0.3 Gpa or more to less than about 1.5 GPa and an indentation hardness of about 0.1 GPa or more to less than about 0.3 GPa, as measured on the hard coating layer thereof using a nano-indenter.

### Claim 16 (depends on 15)

The protective film for optical displays according to claim 15, wherein the first urethane (meth)acrylate oligomer is present in an amount of about 25 wt % or more to about 45 wt % or less, of the total amount of the first urethane (meth)acrylate oligomer and the second urethane (meth)acrylate oligomer.

### Claim 17 (depends on 1)

The protective film for optical displays according to claim 1, further comprising: an adhesive layer formed on a lower surface of the first base layer.

### Claim 18 (depends on 1)

The protective film for optical displays according to claim 1, further comprising: a functional layer formed on an upper surface of the hard coating layer.

### Claim 19 (depends on 18)

The protective film for optical displays according to claim 18, wherein the functional layer provides at least one function of anti-reflection, low reflection, anti-glare, anti-fingerprint, anti-contamination, diffusion, and refraction functions.

### Claim 20 (depends on 1)

The protective film for optical displays according to claim 1, further comprising: a second base layer between the first base layer and the hard coating layer, the second base layer being formed of a thermoplastic polyurethane.

### Claim 21 (depends on 1)

The protective film for optical displays according to claim 1, wherein the protective film has a radius of curvature of about 5 mm or less, when folded in a direction of the first base layer.

### Claim 22 (depends on 1)

The protective film for optical displays according to claim 1, wherein the first base layer comprises an optically isotropic film or a retardation film.

### Claim 23 (depends on 1)

An optical member comprising the protective film for optical displays according to claim 1.

### Claim 24 (depends on 1)

An optical display comprising the protective film for optical displays according to claim 1.